| Type RF Family/Standard Protocol Modulation Frequency Data Rate (Max) Power - Output Sensitivity Memory Size Serial Interfaces GPIO Voltage - Supply Current - Receiving | TxRx + MCU Bluetooth Bluetooth Smart - 2.4GHz ~ 2.48GHz 2Mbps 4dBm -93dBm 256kB Flash, 32kB RAM I²C, SPI, UART 31 1.8 V ~ 3.6 V 13mA 16mA |